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參數(shù)資料
| 型號(hào)： | XC9511A146SRL |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
| 中文描述： | 同步降壓型DC / DC轉(zhuǎn)換器內(nèi)置LDO的同時(shí)加電壓檢測(cè)器調(diào)節(jié)器 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大小： | 180K |
| 代理商： | XC9511A146SRL |
Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector
Preliminary
!
NOTES ON USE (Continued)
"
Application Information (Continued)
14. Should the bi-directional load current of the synchronous DC/DC converter and the regulator become large, please be careful of the
power dissipation when in use. Please calculate power dissipation by using the following formula.
Pd=Pd
DC/DC
+ Pd
VR
DC/DC power dissipation (when in synchronous operation) : Pd
DC/DC
= IDOUT
2
x RON
VR power dissipation : PD
VR
= (VIN - VROUT) x IROUT
RON: ON resistance of the built-in driver transistor to the DC/DC ( = 0.5
<TYP.>)
RON=Rpon x PchOnDuty / 100
+ Rnon x (1 - PchOnDuty / 100)
#
Instructions on Pattern Layout
1. In order to stabilize VIN's voltage level, we recommend that a by-pass capacitor (CIN) be connected as close as possible to the AVDD &
AGND pins. Should it not be possible to place the input capacitors nearby, the regulated output level may increase because of the switching
noise of the DC/DC converter.
2. Please mount each external component as close to the IC as possible.
3. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit impedance.
6. Please use the AVDD and PVDD pins with the same electric potential.
<SOP-8 Recommended pattern layout>
4. Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high ground currents at the time of
switching may result in instability of the DC/DC converter and have adverse influence on the regulator output.
5. If using a Schottky diode, please connect the anode side to the AGND pin through CIN. Characteristic degradation caused by the noise may
occur depending on the arrangement of the Schottky diode.
XC9511 Series
DC/DC
VR
DCOUT (V)
IDOUT (mA)
VROUT (V)
IROUT (mA)
VIN
Semiconductor Ltd.
+
+
+
L
SD
AVDD
P
LX
AGND
VROUT
DCOUT
PVDD
VDOUT
( Through Hole to SD )
CIN2
CL2
CL1
IC
( Through Hole to CIN1 )
CIN1
Data Sheet
13
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| XC9511A14C3 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
| XC9511A14C4 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
| XC9511A14CSRL | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
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